/**
 ******************************************************************************
 * @file    usbd_customhid.c
 * @author  MCD Application Team
 * @brief   This file provides the CUSTOM_HID core functions.
 *
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2015 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 * @verbatim
 *
 *          ===================================================================
 *                                CUSTOM_HID Class  Description
 *          ===================================================================
 *           This module manages the CUSTOM_HID class V1.11 following the "Device Class Definition
 *           for Human Interface Devices (CUSTOM_HID) Version 1.11 Jun 27, 2001".
 *           This driver implements the following aspects of the specification:
 *             - The Boot Interface Subclass
 *             - Usage Page : Generic Desktop
 *             - Usage : Vendor
 *             - Collection : Application
 *
 * @note     In HS mode and when the DMA is used, all variables and data structures
 *           dealing with the DMA during the transaction process should be 32-bit aligned.
 *
 *
 *  @endverbatim
 *
 ******************************************************************************
 */

/* BSPDependencies
- "stm32xxxxx_{eval}{discovery}{nucleo_144}.c"
- "stm32xxxxx_{eval}{discovery}_io.c"
EndBSPDependencies */

/* Includes ------------------------------------------------------------------*/
#include "usbd_customhid.h"
#include "usbd_ctlreq.h"

/** @addtogroup STM32_USB_DEVICE_LIBRARY
 * @{
 */

/** @defgroup USBD_CUSTOM_HID
 * @brief usbd core module
 * @{
 */

/** @defgroup USBD_CUSTOM_HID_Private_TypesDefinitions
 * @{
 */
/**
 * @}
 */

/** @defgroup USBD_CUSTOM_HID_Private_Defines
 * @{
 */

/**
 * @}
 */

/** @defgroup USBD_CUSTOM_HID_Private_Macros
 * @{
 */
/**
 * @}
 */
/** @defgroup USBD_CUSTOM_HID_Private_FunctionPrototypes
 * @{
 */

static uint8_t USBD_CUSTOM_HID_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx);
static uint8_t USBD_CUSTOM_HID_DeInit(USBD_HandleTypeDef *pdev, uint8_t cfgidx);
static uint8_t USBD_CUSTOM_HID_Setup(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);

static uint8_t USBD_CUSTOM_HID_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum);
static uint8_t USBD_CUSTOM_HID_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum);
static uint8_t USBD_CUSTOM_HID_EP0_RxReady(USBD_HandleTypeDef *pdev);
#ifndef USE_USBD_COMPOSITE
static uint8_t *USBD_CUSTOM_HID_GetFSCfgDesc(uint16_t *length);
static uint8_t *USBD_CUSTOM_HID_GetHSCfgDesc(uint16_t *length);
static uint8_t *USBD_CUSTOM_HID_GetOtherSpeedCfgDesc(uint16_t *length);
static uint8_t *USBD_CUSTOM_HID_GetDeviceQualifierDesc(uint16_t *length);
#endif /* USE_USBD_COMPOSITE  */
/**
 * @}
 */

/** @defgroup USBD_CUSTOM_HID_Private_Variables
 * @{
 */

USBD_ClassTypeDef USBD_CUSTOM_HID =
    {
        USBD_CUSTOM_HID_Init,
        USBD_CUSTOM_HID_DeInit,
        USBD_CUSTOM_HID_Setup,
        NULL, /*EP0_TxSent*/
        USBD_CUSTOM_HID_EP0_RxReady,
        /*EP0_RxReady*/         /* STATUS STAGE IN */
        USBD_CUSTOM_HID_DataIn, /*DataIn*/
        USBD_CUSTOM_HID_DataOut,
        NULL, /*SOF */
        NULL,
        NULL,
#ifdef USE_USBD_COMPOSITE
        NULL,
        NULL,
        NULL,
        NULL,
#else
        USBD_CUSTOM_HID_GetHSCfgDesc,
        USBD_CUSTOM_HID_GetFSCfgDesc,
        USBD_CUSTOM_HID_GetOtherSpeedCfgDesc,
        USBD_CUSTOM_HID_GetDeviceQualifierDesc,
#endif /* USE_USBD_COMPOSITE  */
};

#ifndef USE_USBD_COMPOSITE
/* USB CUSTOM_HID device FS Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_CfgDesc[USB_CUSTOM_HID_CONFIG_DESC_SIZ] __ALIGN_END =
    {
        0x09,                           /* bLength: Configuration Descriptor size */
        USB_DESC_TYPE_CONFIGURATION,    /* bDescriptorType: Configuration */
        USB_CUSTOM_HID_CONFIG_DESC_SIZ, /* wTotalLength: Bytes returned */
        0x00,
        0x01, /* bNumInterfaces: 1 interface */
        0x01, /* bConfigurationValue: Configuration value */
        0x00, /* iConfiguration: Index of string descriptor
                 describing the configuration */
#if (USBD_SELF_POWERED == 1U)
        0xC0, /* bmAttributes: Bus Powered according to user configuration */
#else
        0x80, /* bmAttributes: Bus Powered according to user configuration */
#endif                  /* USBD_SELF_POWERED */
        USBD_MAX_POWER, /* MaxPower (mA) */

        /************** Descriptor of CUSTOM HID interface ****************/
        /* 09 */
        0x09,                    /* bLength: Interface Descriptor size*/
        USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface descriptor type */
        0x00,                    /* bInterfaceNumber: Number of Interface */
        0x00,                    /* bAlternateSetting: Alternate setting */
        0x02,                    /* bNumEndpoints*/
        0x03,                    /* bInterfaceClass: CUSTOM_HID */
        0x00,                    /* bInterfaceSubClass : 1=BOOT, 0=no boot */
        0x00,                    /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */
        0x00,                    /* iInterface: Index of string descriptor */
        /******************** Descriptor of CUSTOM_HID *************************/
        /* 18 */
        0x09,                       /* bLength: CUSTOM_HID Descriptor size */
        CUSTOM_HID_DESCRIPTOR_TYPE, /* bDescriptorType: CUSTOM_HID */
        0x11,                       /* bCUSTOM_HIDUSTOM_HID: CUSTOM_HID Class Spec release number */
        0x01,
        0x00,                                    /* bCountryCode: Hardware target country */
        0x01,                                    /* bNumDescriptors: Number of CUSTOM_HID class descriptors
                                                    to follow */
        0x22,                                    /* bDescriptorType */
        USBD_CUSTOM_HID_REPORT_DESC_SIZE & 0xff, /* wItemLength: Total length of Report descriptor */
        USBD_CUSTOM_HID_REPORT_DESC_SIZE >> 8,
        /******************** Descriptor of Custom HID endpoints ********************/
        /* 27 */
        0x07,                   /* bLength: Endpoint Descriptor size */
        USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: */

        CUSTOM_HID_EPIN_ADDR, /* bEndpointAddress: Endpoint Address (IN) */
        0x03,                 /* bmAttributes: Interrupt endpoint */
        CUSTOM_HID_EPIN_SIZE, /* wMaxPacketSize: 2 Bytes max */
        0x00,
        CUSTOM_HID_FS_BINTERVAL, /* bInterval: Polling Interval */
        /* 34 */

        0x07,                   /* bLength: Endpoint Descriptor size */
        USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: */
        CUSTOM_HID_EPOUT_ADDR,  /* bEndpointAddress: Endpoint Address (OUT) */
        0x03,                   /* bmAttributes: Interrupt endpoint */
        CUSTOM_HID_EPOUT_SIZE,  /* wMaxPacketSize: 2 Bytes max  */
        0x00,
        CUSTOM_HID_FS_BINTERVAL, /* bInterval: Polling Interval */
                                 /* 41 */
};
#endif /* USE_USBD_COMPOSITE  */

/* USB CUSTOM_HID device Configuration Descriptor */
__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_Desc[USB_CUSTOM_HID_DESC_SIZ] __ALIGN_END =
    {
        /* 18 */
        0x09,                       /* bLength: CUSTOM_HID Descriptor size */
        CUSTOM_HID_DESCRIPTOR_TYPE, /* bDescriptorType: CUSTOM_HID */
        0x11,                       /* bCUSTOM_HIDUSTOM_HID: CUSTOM_HID Class Spec release number */
        0x01,
        0x00,                                    /* bCountryCode: Hardware target country */
        0x01,                                    /* bNumDescriptors: Number of CUSTOM_HID class descriptors
                                                    to follow */
        0x22,                                    /* bDescriptorType */
        USBD_CUSTOM_HID_REPORT_DESC_SIZE & 0xff, /* wItemLength: Total length of Report descriptor */
        USBD_CUSTOM_HID_REPORT_DESC_SIZE >> 8,
};

#ifndef USE_USBD_COMPOSITE
/* USB Standard Device Descriptor */
__ALIGN_BEGIN static uint8_t USBD_CUSTOM_HID_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END =
    {
        USB_LEN_DEV_QUALIFIER_DESC,
        USB_DESC_TYPE_DEVICE_QUALIFIER,
        0x00,
        0x02,
        0x00,
        0x00,
        0x00,
        0x40,
        0x01,
        0x00,
};
#endif /* USE_USBD_COMPOSITE  */

static uint8_t CUSTOMHIDInEpAdd = CUSTOM_HID_EPIN_ADDR;
static uint8_t CUSTOMHIDOutEpAdd = CUSTOM_HID_EPOUT_ADDR;
/**
 * @}
 */

/** @defgroup USBD_CUSTOM_HID_Private_Functions
 * @{
 */

/**
 * @brief  USBD_CUSTOM_HID_Init
 *         Initialize the CUSTOM_HID interface
 * @param  pdev: device instance
 * @param  cfgidx: Configuration index
 * @retval status
 */
static uint8_t USBD_CUSTOM_HID_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
{
  UNUSED(cfgidx);
  USBD_CUSTOM_HID_HandleTypeDef *hhid;

  hhid = (USBD_CUSTOM_HID_HandleTypeDef *)USBD_malloc(sizeof(USBD_CUSTOM_HID_HandleTypeDef));

  if (hhid == NULL)
  {
    pdev->pClassDataCmsit[pdev->classId] = NULL;
    return (uint8_t)USBD_EMEM;
  }

  pdev->pClassDataCmsit[pdev->classId] = (void *)hhid;
  pdev->pClassData = pdev->pClassDataCmsit[pdev->classId];

#ifdef USE_USBD_COMPOSITE
  /* Get the Endpoints addresses allocated for this class instance */
  CUSTOMHIDInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_INTR);
  CUSTOMHIDOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */

  if (pdev->dev_speed == USBD_SPEED_HIGH)
  {
    pdev->ep_in[CUSTOMHIDInEpAdd & 0xFU].bInterval = CUSTOM_HID_HS_BINTERVAL;
    pdev->ep_out[CUSTOMHIDOutEpAdd & 0xFU].bInterval = CUSTOM_HID_HS_BINTERVAL;
  }
  else /* LOW and FULL-speed endpoints */
  {
    pdev->ep_in[CUSTOMHIDInEpAdd & 0xFU].bInterval = CUSTOM_HID_FS_BINTERVAL;
    pdev->ep_out[CUSTOMHIDOutEpAdd & 0xFU].bInterval = CUSTOM_HID_FS_BINTERVAL;
  }

  /* Open EP IN */
  (void)USBD_LL_OpenEP(pdev, CUSTOMHIDInEpAdd, USBD_EP_TYPE_INTR,
                       CUSTOM_HID_EPIN_SIZE);

  pdev->ep_in[CUSTOMHIDInEpAdd & 0xFU].is_used = 1U;

  /* Open EP OUT */
  (void)USBD_LL_OpenEP(pdev, CUSTOMHIDOutEpAdd, USBD_EP_TYPE_INTR,
                       CUSTOM_HID_EPOUT_SIZE);

  pdev->ep_out[CUSTOMHIDOutEpAdd & 0xFU].is_used = 1U;

  hhid->state = CUSTOM_HID_IDLE;

  ((USBD_CUSTOM_HID_ItfTypeDef *)pdev->pUserData[pdev->classId])->Init();

  /* Prepare Out endpoint to receive 1st packet */
  (void)USBD_LL_PrepareReceive(pdev, CUSTOMHIDOutEpAdd, hhid->Report_buf,
                               USBD_CUSTOMHID_OUTREPORT_BUF_SIZE);

  return (uint8_t)USBD_OK;
}

/**
 * @brief  USBD_CUSTOM_HID_Init
 *         DeInitialize the CUSTOM_HID layer
 * @param  pdev: device instance
 * @param  cfgidx: Configuration index
 * @retval status
 */
static uint8_t USBD_CUSTOM_HID_DeInit(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
{
  UNUSED(cfgidx);

#ifdef USE_USBD_COMPOSITE
  /* Get the Endpoints addresses allocated for this class instance */
  CUSTOMHIDInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_INTR);
  CUSTOMHIDOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */

  /* Close CUSTOM_HID EP IN */
  (void)USBD_LL_CloseEP(pdev, CUSTOMHIDInEpAdd);
  pdev->ep_in[CUSTOMHIDInEpAdd & 0xFU].is_used = 0U;
  pdev->ep_in[CUSTOMHIDInEpAdd & 0xFU].bInterval = 0U;

  /* Close CUSTOM_HID EP OUT */
  (void)USBD_LL_CloseEP(pdev, CUSTOMHIDOutEpAdd);
  pdev->ep_out[CUSTOMHIDOutEpAdd & 0xFU].is_used = 0U;
  pdev->ep_out[CUSTOMHIDOutEpAdd & 0xFU].bInterval = 0U;

  /* Free allocated memory */
  if (pdev->pClassDataCmsit[pdev->classId] != NULL)
  {
    ((USBD_CUSTOM_HID_ItfTypeDef *)pdev->pUserData[pdev->classId])->DeInit();
    USBD_free(pdev->pClassDataCmsit[pdev->classId]);
    pdev->pClassDataCmsit[pdev->classId] = NULL;
    pdev->pClassData = NULL;
  }

  return (uint8_t)USBD_OK;
}

/**
 * @brief  USBD_CUSTOM_HID_Setup
 *         Handle the CUSTOM_HID specific requests
 * @param  pdev: instance
 * @param  req: usb requests
 * @retval status
 */
extern volatile uint8_t motor_start_flag;
static uint8_t USBD_CUSTOM_HID_Setup(USBD_HandleTypeDef *pdev,
                                     USBD_SetupReqTypedef *req)
{
  USBD_CUSTOM_HID_HandleTypeDef *hhid = (USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];
  uint16_t len = 0U;
  uint8_t *pbuf = NULL;
  uint16_t status_info = 0U;
  USBD_StatusTypeDef ret = USBD_OK;

  if (hhid == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

  switch (req->bmRequest & USB_REQ_TYPE_MASK)
  {
  case USB_REQ_TYPE_CLASS:
    switch (req->bRequest)
    {
    case CUSTOM_HID_REQ_GET_REPORT:
      switch (req->wValue & 0xff)
      {
      case 1:
        break;
      case 2:
        if (!motor_start_flag)
        {
          hhid->Report_buf[1] = 0x01;
          hhid->Report_buf[2] = 0x02;
        }
        break;
      case 3:
        hhid->Report_buf[0] = 0x03;
        hhid->Report_buf[1] = 0xff;
        hhid->Report_buf[2] = 0xff;
        hhid->Report_buf[3] = 0x01;
        hhid->Report_buf[4] = 0x00;
        break;
      default:
        break;
      }
      USBD_CtlSendData(pdev, (uint8_t *)&hhid->Report_buf, req->wLength);
      break;
    case CUSTOM_HID_REQ_SET_PROTOCOL:
      hhid->Protocol = (uint8_t)(req->wValue);
      break;
    case CUSTOM_HID_REQ_GET_PROTOCOL:
      (void)USBD_CtlSendData(pdev, (uint8_t *)&hhid->Protocol, 1U);
      break;

    case CUSTOM_HID_REQ_SET_IDLE:
      hhid->IdleState = (uint8_t)(req->wValue >> 8);
      break;

    case CUSTOM_HID_REQ_GET_IDLE:
      (void)USBD_CtlSendData(pdev, (uint8_t *)&hhid->IdleState, 1U);
      break;

    case CUSTOM_HID_REQ_SET_REPORT:
      
      hhid->IsReportAvailable = 1U;
      (void)USBD_CtlPrepareRx(pdev, hhid->Report_buf,
                              MIN(req->wLength, USBD_CUSTOMHID_OUTREPORT_BUF_SIZE));
      break;

    default:
      USBD_CtlError(pdev, req);
      ret = USBD_FAIL;
      break;
    }
    break;

  case USB_REQ_TYPE_STANDARD:
    switch (req->bRequest)
    {
    case USB_REQ_GET_STATUS:
      if (pdev->dev_state == USBD_STATE_CONFIGURED)
      {
        (void)USBD_CtlSendData(pdev, (uint8_t *)&status_info, 2U);
      }
      else
      {
        USBD_CtlError(pdev, req);
        ret = USBD_FAIL;
      }
      break;

    case USB_REQ_GET_DESCRIPTOR:
      if ((req->wValue >> 8) == CUSTOM_HID_REPORT_DESC)
      {
        len = MIN(USBD_CUSTOM_HID_REPORT_DESC_SIZE, req->wLength);
        pbuf = ((USBD_CUSTOM_HID_ItfTypeDef *)pdev->pUserData[pdev->classId])->pReport;
      }
      else
      {
        if ((req->wValue >> 8) == CUSTOM_HID_DESCRIPTOR_TYPE)
        {
          pbuf = USBD_CUSTOM_HID_Desc;
          len = MIN(USB_CUSTOM_HID_DESC_SIZ, req->wLength);
        }
      }

      (void)USBD_CtlSendData(pdev, pbuf, len);
      break;

    case USB_REQ_GET_INTERFACE:
      if (pdev->dev_state == USBD_STATE_CONFIGURED)
      {
        (void)USBD_CtlSendData(pdev, (uint8_t *)&hhid->AltSetting, 1U);
      }
      else
      {
        USBD_CtlError(pdev, req);
        ret = USBD_FAIL;
      }
      break;

    case USB_REQ_SET_INTERFACE:
      if (pdev->dev_state == USBD_STATE_CONFIGURED)
      {
        hhid->AltSetting = (uint8_t)(req->wValue);
      }
      else
      {
        USBD_CtlError(pdev, req);
        ret = USBD_FAIL;
      }
      break;

    case USB_REQ_CLEAR_FEATURE:
      break;

    default:
      USBD_CtlError(pdev, req);
      ret = USBD_FAIL;
      break;
    }
    break;

  default:
    USBD_CtlError(pdev, req);
    ret = USBD_FAIL;
    break;
  }
  return (uint8_t)ret;
}

/**
 * @brief  USBD_CUSTOM_HID_SendReport
 *         Send CUSTOM_HID Report
 * @param  pdev: device instance
 * @param  buff: pointer to report
 * @retval status
 */
uint8_t USBD_CUSTOM_HID_SendReport(USBD_HandleTypeDef *pdev,
                                   uint8_t *report, uint16_t len)
{
  USBD_CUSTOM_HID_HandleTypeDef *hhid;

  if (pdev->pClassDataCmsit[pdev->classId] == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

#ifdef USE_USBD_COMPOSITE
  /* Get Endpoint IN address allocated for this class instance */
  CUSTOMHIDInEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_IN, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */

  hhid = (USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];

  if (pdev->dev_state == USBD_STATE_CONFIGURED)
  {
    if (hhid->state == CUSTOM_HID_IDLE)
    {
      hhid->state = CUSTOM_HID_BUSY;
      (void)USBD_LL_Transmit(pdev, CUSTOMHIDInEpAdd, report, len);
    }
    else
    {
      return (uint8_t)USBD_BUSY;
    }
  }
  return (uint8_t)USBD_OK;
}
#ifndef USE_USBD_COMPOSITE
/**
 * @brief  USBD_CUSTOM_HID_GetFSCfgDesc
 *         return FS configuration descriptor
 * @param  speed : current device speed
 * @param  length : pointer data length
 * @retval pointer to descriptor buffer
 */
static uint8_t *USBD_CUSTOM_HID_GetFSCfgDesc(uint16_t *length)
{
  USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPIN_ADDR);
  USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPOUT_ADDR);

  if (pEpInDesc != NULL)
  {
    pEpInDesc->wMaxPacketSize = CUSTOM_HID_EPIN_SIZE;
    pEpInDesc->bInterval = CUSTOM_HID_FS_BINTERVAL;
  }

  if (pEpOutDesc != NULL)
  {
    pEpOutDesc->wMaxPacketSize = CUSTOM_HID_EPOUT_SIZE;
    pEpOutDesc->bInterval = CUSTOM_HID_FS_BINTERVAL;
  }

  *length = (uint16_t)sizeof(USBD_CUSTOM_HID_CfgDesc);
  return USBD_CUSTOM_HID_CfgDesc;
}

/**
 * @brief  USBD_CUSTOM_HID_GetHSCfgDesc
 *         return HS configuration descriptor
 * @param  speed : current device speed
 * @param  length : pointer data length
 * @retval pointer to descriptor buffer
 */
static uint8_t *USBD_CUSTOM_HID_GetHSCfgDesc(uint16_t *length)
{
  USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPIN_ADDR);
  USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPOUT_ADDR);

  if (pEpInDesc != NULL)
  {
    pEpInDesc->wMaxPacketSize = CUSTOM_HID_EPIN_SIZE;
    pEpInDesc->bInterval = CUSTOM_HID_HS_BINTERVAL;
  }

  if (pEpOutDesc != NULL)
  {
    pEpOutDesc->wMaxPacketSize = CUSTOM_HID_EPOUT_SIZE;
    pEpOutDesc->bInterval = CUSTOM_HID_HS_BINTERVAL;
  }

  *length = (uint16_t)sizeof(USBD_CUSTOM_HID_CfgDesc);
  return USBD_CUSTOM_HID_CfgDesc;
}

/**
 * @brief  USBD_CUSTOM_HID_GetOtherSpeedCfgDesc
 *         return other speed configuration descriptor
 * @param  speed : current device speed
 * @param  length : pointer data length
 * @retval pointer to descriptor buffer
 */
static uint8_t *USBD_CUSTOM_HID_GetOtherSpeedCfgDesc(uint16_t *length)
{
  USBD_EpDescTypeDef *pEpInDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPIN_ADDR);
  USBD_EpDescTypeDef *pEpOutDesc = USBD_GetEpDesc(USBD_CUSTOM_HID_CfgDesc, CUSTOM_HID_EPOUT_ADDR);

  if (pEpInDesc != NULL)
  {
    pEpInDesc->wMaxPacketSize = CUSTOM_HID_EPIN_SIZE;
    pEpInDesc->bInterval = CUSTOM_HID_FS_BINTERVAL;
  }

  if (pEpOutDesc != NULL)
  {
    pEpOutDesc->wMaxPacketSize = CUSTOM_HID_EPOUT_SIZE;
    pEpOutDesc->bInterval = CUSTOM_HID_FS_BINTERVAL;
  }

  *length = (uint16_t)sizeof(USBD_CUSTOM_HID_CfgDesc);
  return USBD_CUSTOM_HID_CfgDesc;
}
#endif /* USE_USBD_COMPOSITE  */

/**
 * @brief  USBD_CUSTOM_HID_DataIn
 *         handle data IN Stage
 * @param  pdev: device instance
 * @param  epnum: endpoint index
 * @retval status
 */
static uint8_t USBD_CUSTOM_HID_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum)
{
  UNUSED(epnum);

  /* Ensure that the FIFO is empty before a new transfer, this condition could
  be caused by  a new transfer before the end of the previous transfer */
  ((USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId])->state = CUSTOM_HID_IDLE;

  return (uint8_t)USBD_OK;
}

/**
 * @brief  USBD_CUSTOM_HID_DataOut
 *         handle data OUT Stage
 * @param  pdev: device instance
 * @param  epnum: endpoint index
 * @retval status
 */
static uint8_t USBD_CUSTOM_HID_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum)
{
  UNUSED(epnum);
  USBD_CUSTOM_HID_HandleTypeDef *hhid;

  if (pdev->pClassDataCmsit[pdev->classId] == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

  hhid = (USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];

  /* USB data will be immediately processed, this allow next USB traffic being
  NAKed till the end of the application processing */
  ((USBD_CUSTOM_HID_ItfTypeDef *)pdev->pUserData[pdev->classId])->OutEvent(hhid->Report_buf[0], hhid->Report_buf[1]);

  return (uint8_t)USBD_OK;
}

/**
 * @brief  USBD_CUSTOM_HID_ReceivePacket
 *         prepare OUT Endpoint for reception
 * @param  pdev: device instance
 * @retval status
 */
uint8_t USBD_CUSTOM_HID_ReceivePacket(USBD_HandleTypeDef *pdev)
{
  USBD_CUSTOM_HID_HandleTypeDef *hhid;

  if (pdev->pClassDataCmsit[pdev->classId] == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

#ifdef USE_USBD_COMPOSITE
  /* Get OUT Endpoint address allocated for this class instance */
  CUSTOMHIDOutEpAdd = USBD_CoreGetEPAdd(pdev, USBD_EP_OUT, USBD_EP_TYPE_INTR);
#endif /* USE_USBD_COMPOSITE */

  hhid = (USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];

  /* Resume USB Out process */
  (void)USBD_LL_PrepareReceive(pdev, CUSTOMHIDOutEpAdd, hhid->Report_buf,
                               USBD_CUSTOMHID_OUTREPORT_BUF_SIZE);

  return (uint8_t)USBD_OK;
}

/**
 * @brief  USBD_CUSTOM_HID_EP0_RxReady
 *         Handles control request data.
 * @param  pdev: device instance
 * @retval status
 */
static uint8_t USBD_CUSTOM_HID_EP0_RxReady(USBD_HandleTypeDef *pdev)
{
  USBD_CUSTOM_HID_HandleTypeDef *hhid = (USBD_CUSTOM_HID_HandleTypeDef *)pdev->pClassDataCmsit[pdev->classId];

  if (hhid == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

  if (hhid->IsReportAvailable == 1U)
  {
    ((USBD_CUSTOM_HID_ItfTypeDef *)pdev->pUserData[pdev->classId])->OutEvent(hhid->Report_buf[0], hhid->Report_buf[1]);
    hhid->IsReportAvailable = 0U;
  }

  return (uint8_t)USBD_OK;
}

#ifndef USE_USBD_COMPOSITE
/**
 * @brief  DeviceQualifierDescriptor
 *         return Device Qualifier descriptor
 * @param  length : pointer data length
 * @retval pointer to descriptor buffer
 */
static uint8_t *USBD_CUSTOM_HID_GetDeviceQualifierDesc(uint16_t *length)
{
  *length = (uint16_t)sizeof(USBD_CUSTOM_HID_DeviceQualifierDesc);

  return USBD_CUSTOM_HID_DeviceQualifierDesc;
}
#endif /* USE_USBD_COMPOSITE  */
/**
 * @brief  USBD_CUSTOM_HID_RegisterInterface
 * @param  pdev: device instance
 * @param  fops: CUSTOMHID Interface callback
 * @retval status
 */
uint8_t USBD_CUSTOM_HID_RegisterInterface(USBD_HandleTypeDef *pdev,
                                          USBD_CUSTOM_HID_ItfTypeDef *fops)
{
  if (fops == NULL)
  {
    return (uint8_t)USBD_FAIL;
  }

  pdev->pUserData[pdev->classId] = fops;

  return (uint8_t)USBD_OK;
}
/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */
